Rich august buttner



(No Model.) 4 Sheets-Sheet 1.

C. L.. P. A. BTTNE'R` & G. MEYER.v

DRL-:R FOR HUMID MATERIAL.

No. 426,361. Patented Apr. 22, 1890.

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4' Sheets-Sheet 2.

C. L. F. A. BTTNER a; o. MEYER. DRIER POR HUMID MATERIAL.

No. 426,361. PatenteaApr. 22,1890.

(No Model.)

(No Model.) 4 sheets-sheen s.

C. L. 1E'. A. B'TTNEB. 8u G. MEYER. DRIBR P0P. HUMID MATBMAL.

No. 426,361. Patented Apr. 22, 1890 IIIIW lz o; w1 fafg 77/z 'busses (No Model.) 4 sheetssheen 4.

C. L. 1?. A. BTTNBR 8u C. I/IEHPER.`

DRIRE POR HUMID MATERIAL.

No. 426,361. PmemedApr. 22, 1890.

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UNrTnn STATES artnr iA union.

CARL LUDYVIG vFRIEDRICH AUGUST BTTNER AND CARL MEYER, OF UERDlNGEN-ON-THF-RHINE, PRUSSIA, GERMANY.

DRIER FOR HUF/HD MATERIALS.

SPECIFICATION' forming part of Letters Patent No. 426,361, dated April 22, 1890;

Application filed July 20, 1889. Serial No. 318,178. (No model.) Patented in France April 3, 1888, No. 189,754; in Belgium April 8,1888, No, 81.283, and in Germany J'uly 24,1888, No. l1.5,080.

.To all whom it may concern:

Be it known that we, CARL LUDWIG FRIED- RICH AUGUST BTrNnR and CARL MEYER, both subjects of the King of Prussia, German Emperor, residing at Uerdin gen-on-th e-Rhine, 1n the Kingdom of Prussia, German Empire, have invented certain new and useful Improvements in Dricrs of Humid Materials, (for which we have obtained patents in Germany, No. 45,080,0n the 24th of July, 1888; in France, No. 189,754, on the 3d of April, 1888; and in Belgium, No. 81,283, on the 3d of April, 1888,) of which the following is a full and clear description.

Our invention relates to an apparatus for drying moist materials-*such as beet-chips, dregs from the production of beer, and humid fuels-together with arrangements for sifting them.

In order to make our invention more clear, we refer to the accompanying` drawings, which form part ofthe present application, and in which similar letters denote similar parts throughout the different figures.

Figure 1 shows a longitudinal section of our improved drying apparatus. Fig. 2 shows a vertical section through the line a Fig. 1. Fig. 3 shows a'horizontal section through the line 7/ Fig. 1. Figs. Il and 5 show a modification of the apparatus.

In order to arrive at a perfect drying of the material in this apparatus, there are two means of transport used at the same time-a positive and a negative. The positive one is a current of air which may be produced by the fan ll, or any other convenient manner, and which acts on the lighter dried particles and conveys them to the exit. The other is a negative one by means of a worm which moves the heavier or moist particles in the opposite directions, and so the moist particles are forced to remain longer in the drying apparatus, and thus be fully dried.

The moist material is tossed about in the apparatus by the stirrer-blades C C, and thus brought in contact with the'circulating warm air and conveyed to the carrying-away worm K. There is a worm S on the shaft Q, arranged nnder Vand between the two sets of stirrer-bladcs C C, with the thread of the ratus.

screw running in the contrary direction to that of the current of air in the apparatus, and by this means are the heavier or wet particles always forced back into the apparatus.

The shaft R of the stirrer-blades C C is driven from a main driving-shaft in any convenient manner by means of pulleys A and gearing c c', and the shaft Q of the worm S is driven by pulleys a a and a band.

In the case of the modification shown in Figs. et and 5, where the transporting-blades S S are fixed to the same shaft R as the stirrer-blades C C, no shaft Q is required. The current of hot air caused by fan H enters the apparatus at 1 I and the material to be dried enters at D. Now the lighter particles of the material will be raised by stirrerblades C, and as soon as dried will be blown by the current of air to the end of the apparatus, where they will fall onto worm K (driven from one of the other shafts in any convenient manner) and be transported out of the machine. The heavier wet particles will also be blown along to a certain extent by the current of air, but will not be raised by the stirrer-blades. In consequence they will be continually carried back into the apparatus by means of worm S until they have become quite dry, when they will be raised by stirrer-blades C' and blown onto worm K and transported by worm K out of the appa- The transporting-blades of the screw could be also fitted to the same frame as the stirrer-blades C, as can be seen in S", Figs. 4L and 5f XVe are aware that a transport-worm. and a current of air have been used in graindriers, and also that a worm in connection with hot air and superheated steam are known in the art and have been used prior to our invention; but in no case has the current of air been used as 'the means of transport and the worm as retarding means. The advantage of this combination is obvious. The wet `particles of the material in question fall to the bottom of theV apparatus and will be carried back and retarded in their progress through the machine, while only the perfectlyudry particles will be transported by the current of air. The process of drying in this IOO bination,witl1 the closed cylinder, of the stirv manner is absolutely perfect, as any moist particles will be held back in the machine so long by the Worin S or blades S until they are dry enough to be blown out by the aircurrent.

Having thus fully described and ascertained the nature of our said invention, what We claim, and desire to secure by Letters Patent of the United States, is*- 1. In driers of humid materials, the comrer-blades for raising the material beingdried, a suction-fan at the outlet end of the cylinder for transporting the dried material, and a Worm arranged, as described, so as to retard those particles of the material which may not have been thoroughly dried, in the manner substantially as described.

2. The combination, with the closed cylinder having air-inlets .I J and hopper D, of the stirrer-blades C C, mounted on the horizontal shaft R, the suction-fan H, situated at the end of the apparatus opposite the airinlets, the ret-arding-blades S', mounted on same shaft as the stirrer-blades, and the transport-Worm K, in the manner and for the purpose substantially as described.

In Witness whereof We have hereunto set our hands in presence of two Witnesses.

CARE LUDWIG FRIEDRICH u AUGUST BU'ITNER.

CARL MEYER.

Witnesses:

JoHs. SoriLossER,l ALBERT AssMANN. 

